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    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
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    <script>
        // js 是弱数据类型，只有当我们赋值了，才知道什么数据类型
        let num=10.11
        console.log(num);
        // 加，减，乘，除，取余%
        console.log(2+2);
        console.log(2-2);
        console.log(2/2);
        console.log(2 % 2);
        console.log(3 % 5);
    </script>
</body>
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